One afternoon in late September, Coweta County Sheriff Investigator Jason Fetner asked Christopher Bailey, a 35-year-old substitute teacher at East Coweta High, to meet with him regarding a school theft. But when Bailey arrived, Fetner told him the real reason for their meeting: he knew that Bailey had been posting photos of his students—“Hot senior girl in one of my classes,” read one charming caption—on the subreddit r/CreepShots, some of which had been viewed thousands of times.

Other Redditors have been gathering information about posters to the CreepShots thread and using it to ID the worst offenders.